// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CC_RASTER_ZERO_COPY_RASTER_BUFFER_PROVIDER_H_
#define CC_RASTER_ZERO_COPY_RASTER_BUFFER_PROVIDER_H_

#include <stdint.h>

#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/values.h"
#include "cc/raster/raster_buffer_provider.h"

namespace base {
namespace trace_event {
    class ConvertableToTraceFormat;
}
}

namespace cc {
class ResourceProvider;

class CC_EXPORT ZeroCopyRasterBufferProvider : public RasterBufferProvider {
public:
    ~ZeroCopyRasterBufferProvider() override;

    static std::unique_ptr<RasterBufferProvider> Create(
        ResourceProvider* resource_provider,
        ResourceFormat preferred_tile_format);

    // Overridden from RasterBufferProvider:
    std::unique_ptr<RasterBuffer> AcquireBufferForRaster(
        const Resource* resource,
        uint64_t resource_content_id,
        uint64_t previous_content_id) override;
    void ReleaseBufferForRaster(std::unique_ptr<RasterBuffer> buffer) override;
    void OrderingBarrier() override;
    ResourceFormat GetResourceFormat(bool must_support_alpha) const override;
    bool IsResourceSwizzleRequired(bool must_support_alpha) const override;
    bool CanPartialRasterIntoProvidedResource() const override;
    void Shutdown() override;

protected:
    ZeroCopyRasterBufferProvider(ResourceProvider* resource_provider,
        ResourceFormat preferred_tile_format);

private:
    std::unique_ptr<base::trace_event::ConvertableToTraceFormat> StateAsValue()
        const;

    ResourceProvider* resource_provider_;
    ResourceFormat preferred_tile_format_;

    DISALLOW_COPY_AND_ASSIGN(ZeroCopyRasterBufferProvider);
};

} // namespace cc

#endif // CC_RASTER_ZERO_COPY_RASTER_BUFFER_PROVIDER_H_
